Centrifugal pump.



J. B. SPERRY.

CENTRIFUGAL PUMP.

APPLICATION FILED JUNE 3,1912.

1,174,1 92. Patented Mar. 7,1916.

2 SHEETSSHEET I.

J. B. SPERRY.

CENTRIFUGAL PUMP.

APPLICATION men JUNE 3.1912.

1,174,192. Patented Mar. 7,1916. a

W WU 552 Wz'zzis a' (UNITED STATES PATENT OFFICE.

JOHN B. SPERRY, OF AURORA, ILLINOIS, ASSIGNOR TO THE AMERICAN WELL WORKS,

' OF AURORA, ILLINOIS, A CORPORATION OF ILLINOIS. I

GENTRIFUGAL PUMP. l

To all whom it may concern: 7

Be it known that I, JOHN B. SPERRY, a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Centrifugal Bumps, of which-the following is a specification, reference being bad to the accompanying drawings.

My invention relates to centrifugal pumps, and has for its objects to provide an improved construction for balancing the runner when in operation; to provide for sealing the runner chamber to prevent the admission of air from above; and to provide improved means for supporting and adjusting the runner-shaft. I accomplish these objects as illustrated in the accompanying drawings and as hereinafter described. What I regard as new is set forth in the claims.

In the drawings-Figure 1 is a perspective view of my improved pump; Fig. 2 is a plan view of the shell or casing of the pump with the head mounted thereon; Fig. 3 is a central vertical section on line 33 of Fig. 2; Fig. 4 is a detail illustrating a. part of the pump-shaft; Fig. 5 is an enlarged detail, partly in section, illustrating the manner of supporting the pump-shaft; and Fig. 6 is a horizontal section on line 6'6 of Fig. 5.

Referring to the drawings7 indicates the shell or casing of the pump, which is of the volute type, having an axial inlet 8 at the under side and an outlet 9, which, as shown in Fig. 1,. is preferably directed upward. The casing 7 g is provided with depending brackets 10 at intervals, which form supports therefor, and is also preferably provided with upwardly-projecting brackets 11, which form supports for the timbers or other parts of the frame when it is-desired to erect a frame for supporting the pump.

12 indicates a head, which is fitted upon the upper side of the casing 7 and forms the upper side of the pump chamber 6. The head 12 is providedwith flanges. 13 through which pass screws 14 which serve to secure the head to the casing 7, as shown in Fig. 3.

15 indicates an annular flange which rises from the bottom 16 of the head, forming therewith a-receptacle or container 17 which is designed to contain water, as lndlcated 1n,

Specification of Letters Patent.

Patented Mar. 7, 1916.

- Application filed J'uile a, 1912. Serial No. 701,196.

Fig. 3. The chamber 17 is supplied with water through a pipe 18, or by any other suitable means. 19 indicatesa stufiing-box arranged axially 1n the chamber 17, said stufling-box having a follower 20. The purpose of the stuffingbox lsto form a tight joint around a "ertically-disposed pump-shaft 21 which is axially arranged with regard to the head 15 and pump-chamber 6 and projects into the latter, as shown. The follower 20 is somewhat below the upper margin of the flange 15 so that it is submerged in the water in the chamber 17, thus providing a water seal for the stuffing-box which prevents the passage of air downward around the pumpshaft into the chamber 6.

22 indicates a standard, preferably formed integral with the flange 15, which serves as a support for a sleeve 23 which forms a bearing for the shaft 21, saidsleeve being provided between its ends with an annular flange 24 which fits upon the standard 22 and is secured thereto by bolts 25, as shown different positions of adjustment by a setserew 29, as shown in Fig. 3.

30 indicates" a ring having a ball-race, which ring rests upon the block 27 and carries anti-friction balls31.

32 indicates a collar, which has a ball-race I i Said collar also holds up the pumpexternal diameter of the lower portions'36 of said members Whenthey are fitted together is substantially equal to the external diameter of the pump-shaft 21, butethey are provided with shoulders 37 at their upper portions which are of somewhat greater diameter, as shown in Fig. 5. The internal diameter of the collar 32 is substantially the same as that of the pump-shaft 21, and the arrangement is such that, said collar is adapted to slip over the lower portions 36 of the collar members 3435 when they are fitted in the groove 33 of the pump-shaft 21, as shown in Figs. 3 and 5. Thus, when the collar 32' is in the position shown in said figures, it serves to hold the collar members 34-35 in the groove 33 and also serves to transmit the weight of the shaft to the ball bearings and thence to the standard 22 and pump casing. Obviously, by adjusting the block 27 vertically, the pump-shaft 21 may be vertically adjusted to regulate the position of the runner or vary the position of other parts carried thereby, as hereinafter described.

38 indicates a coupling for conneotingthe upper end of the shaft with any suitable source of power, such as an electric motor or a steam engine. Any suitable form of coupling may be employed.

39 indicates a-runner carried at the lower end of the shaft 21 in the chamber 6. This runner may be of any suitable type and is adapted to rotate in the chamber 6 and pump Water in the manner common to cen trifugal pumps of this type.

tend 'the'rethrough, as shown.

40 indicates a piston mounted axially upon the shaft 21 immediately below the bottom-plate 16 of the head 15, being fitted in a recess formed in said bottom-plate, as sho-wnin Fig. 3. Said piston is provided with one or more perforations 41 which ex- It will-be noted that the diameter of the piston .40 is substantially equal to the least diameter of the inlet opening 8. The purpose of this arrangementis to provide for balancing the runner by causing a suction on the upper side of the piston 40 substantially equal to the downward 'pull at the inlet side of the runner, thus making the runner operate more smoothly and overcoming its tendency to bear on the lower wall of the pump-chamber.

While I have described with considerable particularity the embodiment of my invention illustrated in the accompanying drawings, I wish it to be understood that I do not restrict myself tothe specific details of the construction shown and described, except in so far as they are particularly claimed, as my invention includes generically the subject-matter of the broader claims.

That which I claim as my invention, and desire to secure by Letters Patent, is,-

1. In a pump, the combination of a pump chamber, acover therefor, a receptacle formed integrally with said cover on its upper face adapted to contain water, a shaft projecting into said chamber through a suitable opening through said cover, a runner mounted on said shaft in said chamber, and a stufiing-box surrounding said shaft in said receptacle adapted to be covered by the water therein.

2. In a pump, the combination of a pumpchamber, a cover therefor. a receptacle formed integrally with said cover on its upper face adapted to contain water, a stufting-box formed integrally with said cover and rising therefrom within said receptacle, a shaft projecting into said chamber through said stufling-boX, and a runner mounted on said shaft in said chamber.

3. In a pump, the combination of a pumpchamber, a shaft projecting into said pumpchamber, a runner mounted on said shaft in said chamber, the upper wall of said cham ber being in the form of a receptacle adapted to contain water, a stuffing-box mounted in the bottom wall of said receptacle below the level of the water therein, and a bearing for said shaft carried by said receptacle above the water therein.

JOHN B. SPERRY.

Witnesses: R. D. MAHAFFEY, M. 'T. CHAPMAN.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington. D. G. 

